GeForce 830M vs Geforce GTX 690

Intro

Compare that to the Geforce GTX 690, which features GPU clock speed of 915 MHz, and 2048 MB of GDDR5 memory set to run at 1502 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Geforce GTX 690		300 Watts
	Difference: 275 Watts (1100%)

Memory Bandwidth

Theoretically, the Geforce GTX 690 should be quite a bit faster than the GeForce 830M overall. (explain)

Geforce GTX 690		384512 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 370112 (2570%)

Texel Rate

The Geforce GTX 690 is quite a bit (about 1323%) faster with regards to anisotropic filtering than the GeForce 830M. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 217776 (1323%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 690 is superior to the GeForce 830M, and very much so. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 50328 (611%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.